Folding box



C. C. MILLER Nov. 24, 1931.

FOLDING BOX Filed OCT.. 30. 1929 A TTORNEY.

Patented Nov. 24, 1931 vUNITED STATES PATENT OFFICE A Application medOctober 80, 1929. lcrlal lo. 403,585.

The invention relates to folding boxes and particularly to paper boardboxes adapted to withstand rough handlin such as in the shipment of.goods by freig t or express. l`" The object of my mventlon is to rovidea pa r board folding box that is rea ily set up anewhich is providedwith novel reinforcetmpnts to give a maximum strength to the x. Theinvention is illustrated in the accompanying drawings, in which Figure 1is a plan view of the blank which, when set u forms the box Fig. 2 aplan view of the box 1n set-up-condition; Fig..3 a crosslu section online 3-3 of Fig. 2; Fig. 4 a crosssection on line 4-4 of Fig. 2.

In the illustrative embodiment of the invention the blank 1 isformed'from a sheet of suitable paper board and is scored along thebroken lines 2, 3, 4 and 5 tovform the bottom section 6 and the sidesections 7, 8, 9 and 10, the scorin forming fold lines for the sidesections. wo o posite side sections, as 9 ,i and 10, are exten edand'scored at 11, 12 to L2 5, form two flaps 13, 14 which are adapted tofold inwardly anddownwardly on the scorings 11, 12 when the sections 9,10 are erect. Further extensions 15, 16 are formed on the aps 13, 14 anddefined by the scorings 17, 18, 30 the outer edge of each extensionpreferably being serrated and adapted to engage the bottom section andthe opposite edges of a reinforcing section 19 that is secured to thebottom section. This engagement of the extensions 15, 16 with the bottomsection and with the reinforcement 19 lock .the sidewalls in uprightposition. I find that by applying a minimum amount of glue to the bottomsecl tion preferably in laterally'separated relatively narrow streaksand pressing the section 19 onto said streaks of glue that the saidsection 19, as thus attached to the bottom section, increases thelstrength of said bottom section much more than if the entire surface4.5 of the section 19 were secured to said bottom.

The corner sections 20 are defined by the y scorings 21, 22, thescorings 21 between the sections 20'and the side sections 9 and 10 beingsuch that the fold lines formed thereby are @5 weaker` than the scorings22. Each corner section is diagonally scored at 23, a portion of eachscoring consisting of perforations in the material. The weakenedscorings 21 and 23 cause the corner sections to collapse and foldagainst the side sections 9 and 10 when 55 Ehe latter sections areelevated to set up the Each side section 9 10 is extended at oppositeends to form the flaps 24 which, when the box is set up, fold inwardlyagainst the ad- 30 jacent side walls 7, 8 respectively. These ggpsreinforce and stiifen the corners of theI Extensions 19 are formed onthe reinforcing section 19 and abut the side walls 7, 8, to 55 reinforcethe latter walls alongtheir junction lines with the section 6.

The top or cover portion of the box is similar to the bottom portionexcept that it y is slightly larger than the bottom so that the twoortions will telescope. If the box is square t e top portion will be-soplaced on the bottom portion that itsA aps 13, 14 abut the side walls 7,8 of said bottom portion and thereby secure three thicknesses ofmaterial at each side of the box. When the box is rectangular in formthe flaps 13, 14, the y locking extensions 15, 16 and the flaps 24thereon are formed on two opposite side sections of the bottom portion,such as sections so 9, 10, and on the top portion said parts will beformed on the end walls 7, 8 thereof, the reinforcing flaps 19. bein adated to abut the remaining opposite si e wal s of the top portion,whereby to secure three thicknesses of material on al1 sides of the boxwhen closed.

It is thus seen that I have provided an exceptionally strong and rigidpaper board box that will withstand a maximum of abuse in 9o handling.`When collapsed the two box portions occupy a minimum of space and itrequires very little eifort to set them up when required for use.

What I claim is:

1. A flat, unfolded blank for folding boxes including a body portion,wall-forming portions at the sides ofthe body portion and defined byweakened fold lines, collapsible corner members defined from adjacentwallfined therefrom by weaken extending from the opposite free end edgesof f the body portion when folde the free lonn gitudinal ed of eachlatter fla being sery 19 rated, a rein orcing member on t e body portionadapted to be enga ed at two opposite y edges by said serrated edges andHap exten,- sons exten from the remaining opposite i edges of thereinforcing member and adapted 15 to ngge the adjacent wall-formingportion an t fold line thereof; l 2. A flat, unfolded blank for foldingboxes gaing the remainin opprsite side walls, an 'extensions exten mg mthe opposite ends of the flap extensions on two o posite side wells andfolded inwardly to reinforce the remaining side walls and the fold linesthereof.

In' witness whereof I have hereunto signed my name.

CHARLES C. MILLER.

including a body portion, wall-forming rtions at the sides of the bodyportion an 4de- 'l 9 fined by weakened fold lines, collapsible coro nermembers defined from adjacent wallforming portions by weakened foldlines, flap sections extending from the free edges of two oppositewall-forming ortionsand defold lines, flaps the flaps and defined terefrom by weakened fold lines, aps extending from the lon 'tu dinalfree edges of the flap sections an dea. lined therefrom by weakened foldlines and ada d to engage the body portion when fol ed the freelongitudinal edge of leach latter da bein serrated,areinforcing memberon the y portion adapted to be enu gaged at two opposite edges by saidserrated edges and ap extensions extending from the remaining oppositeedges of the reinforcing member and adapted to en age the adjacentwfall-forming portions and e fold line thereo 8. In a box of the classdescribed having a body portion and side walls thereon, corner membersconnecting adjacent side walls and collapsed inwardly agamst twoopposite side tion, flap extensions on the latter side walls walls, areinforcing member on the body porfolded over the collapsed cornermembers and having extensions enga ngthebody portion and two opposite eges of thereining aps at its remaining opposite ed engaging theremaining opposite side w 1s and rinforcmg the same and the fold linesthereo 55 4. In a box of the class described having a y body portion andside walls thereon, corner members connecting adjacent side walls andcollapsed inwardly against two opposite side walls7 a reinforcing memberon the body por- 0 tion, flap extensions on the latter side walls foldedover the collapsed corner members and having extensions engaging,l thebody portion and two opposite edges of the reinforcingmemberlthereinforcing member having flaps at its remaining oppositeedges enforcing member, the reinforcing member havy

